Admathedu is a peer-reviewed open access journal published twice in a year (June and December) since 2011. The Admathedu aims to provide an national forum for researchers and professionals to share their ideas on all topics related to mathematics education.

Abstract

This study aims to improve the learning outcomes of students of class X Accounting 1 SMK Muhammadiyah Wonosari on teaching mathematics subject flat wake. Improved learning outcomes intended in this study is the average value over 75 and increased in every cycle test performed on each end of the discussion of the basic competencies and increased the percentage absorption per basic competence from one cycle to the next cycle. Efforts to improve the learning outcomes apply 9 adult learning principles RAMP 2 FAME (Recency, appropriateness, Motivation, Primacy, 2 way communication, feedback, Active learning, learning Multi sense, Exercise. The study was Classroom Action Research (CAR) using a model of Kemmis & McTaggart. Subjects in this study were all students of class X Accounting 1 SMK Muhammadiyah Wonosari Academic Year 2011/2012. The object of this research is the implementation of learning mathematics by applying 9 adult learning principles RAMP 2 FAME. PTK is accomplished in two cycles, each cycle was implemented in three meetings. In each cycle, the first and second meetings held for the learning and the last meeting held on the test cycle or daily tests per basic competence. The instruments used in the data collection in this study was achievement test. The results showed that there was an increase in students class X Accounting 1 SMK Muhammadiyah Wonosari on the subject of flat wake up after the action by applying the 9 principles of adult learning RAMP 2 FAME. Improved student learning outcomes is evident from the increase in value of the average grade on each test cycles performed per basic competence. The average value of the class on the first cycle test is 66.68 increased to 76.19 in the second cycle, while the percentage of absorption increased from 45.16% in the first cycle to 51.61% in the second cycle. Key words: adult learning, RAMP 2 FAME, learning outcomes

Abstract

The public has many ways to invest money, one of them by buying obligation in the capital market. A rational investor should consider the expected income and risk of alternative investments contained does. The study was conducted to determine the rate of return/ total risk of stocks returns and investment in the company/ issuer elected and predict stock returns one year later. Analysis of the data used are time series analysis using decomposition-ARIMA method. The data used in this study is the stock return of monthly data from January 2003 to December 2007. Analysis of stock returns from January 2003 to December 2007 showeda trend of rising prices down. Fluctuations in stock returns peaked in August 2004. Decomposition method is used to forecast the trend and seasonal component, while the ARIMA method is used to predict cyclical and random components. Decomposition method used is the multiplicative decomposition. The best ARIMA models used to predict cyclical and random components of the ARMA (2,1) in equation form as follows :0,6286 + 0,3480 + - 0,9361 The value of MAPE = 17,89 % dan MSE = 9,471. Forecastong is done to show that the lowest return in January is the right position to buy the stock, while the highest return in March is the right position to sell the stock.

Abstract

Gender factor as one of the factors that affect the learning process and learning outcome should be accommodated in the learning process. Therefore, please note the significance of differences in learning outcomes based on gender differences. Faculty of Tarbiyah have heterogeneous characteristics of courses, ranging from religious studies program, science, and language. Studies on student results shows that students learning outcomes male students better than female students on Tadris Mathematics Study Program. As for Islamic Education study program, Arabic Education, Islamic Education and Physics Tadris female student results are better than student learning outcomes of men. As for the Tadris English, Tadris Chemistry, Tadris Biology and MI Teacher Education data processing results showed no significant differences.

Abstract

Rabies is a fatal zoonotic viral disease caused by a virus which attacks the central nervous tissue. According to the World Health Organization (WHO), every year as many as 55,000 people die because they were infected by rabies virus. It is estimated as many as 95% of the incident occurs in Africa and Asia. Almost 99% of the transmission of rabies virus to humans is caused by dogs. It required some efforts to halt the spread of rabies. Some of which is by vaccination and culling the dogs. A mathematical model is required to analyze those efforts so that they became optimal when they applied to the field. Dogs population can be divided become two compartment as healthy (X) and infected dogs ( ). The model will be analyzed using linearization method to determine the characteristics of the population dynamics of healthy and infected dogs. To strengthen the analytical results, will be simulated using Runga-Kutta 4th order method. The result of the research showed that vaccination and culling methods are less effective in eradicating rabies, but by doing a certain level of vaccination and culling level of dogs, the eradicating of rabies spreading still can be done as long as it meets certain criteria.

Abstract

In mathematics, beauty can be thought of as a "certain expectation" for a "natural outcome". Mathematical sciences application have appeared in the field of art, particularly music. One example of its application namely Fibonacci sequence and Golden Ratio. This research aims to create two songs with the Fibonacci sequence and Golden Ratio. The first song were created by applying the elements of the Fibonacci 100% while the second song with the implementation of Fibonacci 64%. Then the sense value ratio from both songs are analyzed using the Wilcoxon test with 16 respondents from ISI Denpasar students (Indonesian Art Institute in Denpasar). This research is expected to add knowledge about the mathematics application to the arts, escpecially the art of music.

Abstract

This study aims to improve Mathematics learning motivation through a contextual approach to students of MTs Ibnul Qoyyim sons boarding school Yogyakarta. This research is an action research. Setting of this research is 22 students of class Ia. Research planning is done for three cycles and completed in the second cycle. The first cycle consists of two meetings and the second cycle consists of two meetings. The data collected by the technique of diagnostic testing, observation sheet, questionnaire, interviews and documentation. The results of diagnostic tests on each cycle increased the average of learning results, which is from 78.48 in the cycle I to 84.02 in the cycle II. The results of student learning motivation questionnaire at the beginning of the meeting 65.22% included as the middle category. After done the learning by using the contextual approach, students learning motivation on cycle I are 74.44% and 75.56% in cycle II included as the high category. Based on questionnaire responses of students are 91.96% categorized as very interested. From observations and interviews result, it can be deduced that students respond positively to learning through contextual approach. So that, it can be concluded overall that learning through contextual approach can enhance students learning motivation MTs Ibnul Qoyyim sons boarding school Yogyakarta class Ia odd semester in academic year 2011/2012 with the subject of integers.

Abstract

This study aims to design and develop interactive multimedia-based learning media on the topic derivatives function and knowing students interest while using the interactive multimedia-based learning media on the topic derivatives function. This research is a development of a model ADDIE (Analysis, Design, Development, Implementation, and Evaluation) used to produce a product. The product is mathematics learning media interactive multimedia-based. The research is carried out at SMA 2 Yogyakarta. The research data is obtained from the questionnaire validation media by media experts, questionnaire validation media by media matter experts, questionnaire evaluation media by student questionnaires and student interest questionnaire. The research data are analyzed quantitatively and qualitatively for the purpose of media evaluation. The analysis phase determines that the material is packaged in a learning media. The learning media is the derivative function which is developed using Macromedia Flash 8. At the development stage, media and materials experts conduct a trial of small groups that aim to test the media feasibility. Media validation questionnaire obtains percentage of 85,44% and 77,60%, and both of percentage are good category. In the implementation stage, a field test is conducted to test the learning media and knowing students interest towards the learning media. Students media evaluation questionnaire obtains percentage of 74,38% and 74,06% of interest questionnaire. It is concluded that the mathematics learning media interactive multimedia-based in the topic derivatives and function is feasible and can attract students learning interest in using learning media. Key words : learning media, ADDIE, derivative function

Abstract

The purpose of this research is to describe the profile of creativity in solving geometry problems of junior high school students based on cognitive styles of reflective. The assessment of creativity is based on the assessment in solving geometry problems which made by the subject that consists of the three aspects of creativity, which are: fluently, flexibility, and novelty. The aspect of fluently in solving geometry problems is considering on the ability of students for making many of correct solutions. The aspect of flexibility in solving geometry problems is considering on the way of making different correct solutions. The aspect of novelty is considering on the ability of students on making different solutions from previous answer which noted as usual. Two solutions are different if the concepts or context which made by the students are different or unsual compare to the ability of others in their ages. This research is descriptive research by using qualitative approach. The research is taking place on class VIIIA SMP YDWP (Yayasan Darma Wanita Persatuan) UNESA in May on school year of 2010/2011. The subject is 1 student with reflective cognitive style, the method to choose subject of research by using MFFT (Matching Familiar Figure Test). The subject was given a problem of geometry continued with the interviewed related to the task, the using time triangulation to observe validity of data, then the valid data is analyzed based on creativity aspects. The profile of creativity in solving geometry problems of junior high school students based on reflective cognitive style as followed: 1) fluency: the student with reflective style can figure many correct flat figure of geometry as determine from the task. 2) flexibility: the student with reflective can not find or make different figure on the their own geometry flat. 3) novelty: student with reflective style can make correct figure of flat geometry which new or different in the concept or context that never made before compare to others of their ages. From the completeness of aspects as mention above, then the reflective student is concluded as creative because can fill the aspects of fluency and novelty in solving geometry problems.

Abstract

The problems studied in this article is the selection of model formed from all possible subsets of independent random variables in multiple linear regression equation. The purpose of this study is to determine the multiple linear regression parameter estimation and choose the best regression equation which will be used to predict the random variables which are bound. In this Thesis, The method used is the the smallest Squares method and Bootstrap Methods. The smallest Squares method is used to determine the regression parameter estimation which the results of residual resampling used to obtain regression parameter estimation using the Bootstrap method. The Criteria of model selection uses Statistics . The equation regression with the smallest Statistics is the best equation model. Comparison between the estimation parameter and the parameter sought by Vector Norm. To be easy in calculating of determining parameter estimation and Statistics use Matlab program. The performance of the proposed method is viewed by simulation method. From the simulation result and comparison between the parameter estimation and the parameters, it can indicate that the Bootstrap method can estimate the parameter accurately. As the example of application, those both methods are applied in Indonesion Bank data relating to the amount of circulating money and the factors that influence it.

Abstract

This research was to know the increase of result learn and interest of learning mathematics at SMP IT Masjid Syuhada Kotabaru Yogyakarta, in Oktober-November 2011. Subject were collected amount to 17 people. The data collecting instruments included an assay test and interest questionnaire. The data were analyzed using analysis descriptive. The result of research indicated the approach of Think-Pair-Share can improve result learn and interest of learning mathematics at chapter one variable linear equation. Where average interest of learning mathematics of the students was indicated high with average 41,18. The result of learning increased from 68,71 to 79,76.